public async Task CS_WP_MC_PreviewTranscode(EffectType effectType) { StorageFile source = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Input/Car.mp4")); StorageFile destination = await KnownFolders.VideosLibrary.CreateFileAsync("CS_WP_MC_PreviewTranscode_" + effectType + ".mp4", CreationCollisionOption.ReplaceExisting); var definition = await Utils.CreateEffectDefinitionAsync(effectType); var clip = await MediaClip.CreateFromFileAsync(source); clip.VideoEffectDefinitions.Add(definition); var composition = new MediaComposition(); composition.Clips.Add(clip); MediaStreamSource sourceStreamSource = composition.GenerateMediaStreamSource(); using (IRandomAccessStream destinationStream = await destination.OpenAsync(FileAccessMode.ReadWrite)) { var transcoder = new MediaTranscoder(); var transcode = await transcoder.PrepareMediaStreamSourceTranscodeAsync(sourceStreamSource, destinationStream, MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Qvga)); await transcode.TranscodeAsync(); } }
public async Task CS_WP_MC_LumiaCropSquare() { StorageFile source = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Input/Car.mp4")); StorageFile destination = await KnownFolders.VideosLibrary.CreateFileAsync("CS_W_MT_CropSquare.mp4", CreationCollisionOption.ReplaceExisting); // Select the largest centered square area in the input video var encodingProfile = await MediaEncodingProfile.CreateFromFileAsync(source); uint inputWidth = encodingProfile.Video.Width; uint inputHeight = encodingProfile.Video.Height; uint outputLength = Math.Min(inputWidth, inputHeight); Rect cropArea = new Rect( (float)((inputWidth - outputLength) / 2), (float)((inputHeight - outputLength) / 2), (float)outputLength, (float)outputLength ); encodingProfile.Video.Width = outputLength; encodingProfile.Video.Height = outputLength; var definition = new LumiaEffectDefinition(new FilterChainFactory(() => { var filters = new List<IFilter>(); filters.Add(new CropFilter(cropArea)); return filters; })); definition.InputWidth = inputWidth; definition.InputHeight = inputHeight; definition.OutputWidth = outputLength; definition.OutputHeight = outputLength; var clip = await MediaClip.CreateFromFileAsync(source); clip.VideoEffectDefinitions.Add(definition); var composition = new MediaComposition(); composition.Clips.Add(clip); MediaStreamSource sourceStreamSource = composition.GenerateMediaStreamSource(); using (IRandomAccessStream destinationStream = await destination.OpenAsync(FileAccessMode.ReadWrite)) { var transcoder = new MediaTranscoder(); var transcode = await transcoder.PrepareMediaStreamSourceTranscodeAsync(sourceStreamSource, destinationStream, MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Qvga)); await transcode.TranscodeAsync(); } }